Re: [volt-nuts] HP 3457A

2013-08-11 Thread Charles Steinmetz
Orin wrote: They send a calibration certificate which claims that their standards are traceable to NIST. I have no reason to doubt that. Owning standards and instruments with traceable calibrations is necessary but not sufficient for making traceable calibrations with them. For a

Re: [volt-nuts] HP 3457A

2013-08-11 Thread J. L. Trantham
Joe, I looked at the listing you posted. The unit looks very nice. However, the units are selling in the $150 - $250 range, although I note some of the units you linked to have sold for the price asked. There has been considerable discussion on the list about the 3457A and some differences

Re: [volt-nuts] HP 3457A

2013-08-11 Thread Chuck Harris
I think the statement is awkward English, but what I think he is trying to say is that: 1) the instrument will be recalibrated 2) after the instrument is verified, by the calibration lab, to be working within specs, 3) a NIST traceable calibration certificate will be mailed. -Chuck Harris

Re: [volt-nuts] HP 3457A

2013-08-11 Thread Orin Eman
They shipped the certificate with the 3456A I got from them. The cal certificate is from AAA Calibration Equipment Specialist Inc. at a SW Albuquerque address and is issued to AAA Equipment Resources Inc. at a NW Albuquerque address. I suspect some internal accounting reason or a defense

Re: [volt-nuts] HP 3457A

2013-08-11 Thread Dr. David Kirkby
On 11 August 2013 03:19, Joseph Gray jg...@zianet.com wrote: If I want to buy a used 3457A, is it better to buy one as-is and send it for calibration, or perhaps spend a bit more and get one already calibrated? Just one example:

Re: [volt-nuts] HP 3457A

2013-08-11 Thread Charles Steinmetz
Orin wrote: The cal certificate is from AAA Calibration Equipment Specialist Inc. at a SW Albuquerque address and is issued to AAA Equipment Resources Inc. at a NW Albuquerque address. Those are both the seller: http://www.bizapedia.com/nm/AAA-CALIBRATION-EQUIPMENT-SPECIALIST-INC.html

Re: [volt-nuts] Calibration and Certification - Trust and detail

2013-08-11 Thread Dr. David Kirkby
On 11 August 2013 15:39, Robert Atkinson robert8...@yahoo.co.uk wrote: On a related issue to the 3457A calibration, I was asked to review an item at work last week (sorry can't say what or why). Looking at compliance certification by two fully qualified, internationally recognised labs, all

Re: [volt-nuts] Calibration and Certification - Trust and detail

2013-08-11 Thread Charles Steinmetz
David wrote: How useful is this http://www.ebay.com/itm/281149723636 ? On the fact of it, the device would give one a reasonly high confidence something is working readlably well. I wonder if that is good enough for a 3457A. Let's assume that it is still working exactly the same as it was